Function intersect_ray3_triangle3 

pub fn intersect_ray3_triangle3<S>(
    ray: Ray3<S>,
    triangle: Triangle<S>,
) -> Option<(NonNegative<S>, Point3<S>)>
where
    S: Real + Real + AbsDiffEq<Epsilon = S>,

Available on crate feature math-utils only.

Boolean intersection computation of a ray with a triangle